Responses of plant community biomass to nitrogen and phosphorus additions in natural and restored grasslands around Qinghai Lake Basin

Li, Chunli; Li, Qi; Zhao, Lu; Xin-Quan, and ZHAO

doi:10.17521/cjpe.2016.0048

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…In this semiarid ecosystem around QLB, water availability might be another limiting factor restricting plant growth, which resulted in the negative feedback of AGB to GST ( Figure 3A ). Vegetation coverage in RG (40%) was lower than that of NG (80%; Li et al, 2016b ), which would lead to comparatively intense soil evaporation, and climatic warming would subsequently affect soil moisture in RG. Soil moisture of NG changed little between the experimental years and was relatively higher than that of RG (Li et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, P addition elevated plant AGB of NG significantly in 2014 (Li et al, 2016b ). The following two factors may cause this effect.…”

Section: Discussionmentioning

confidence: 99%

“…Land-use transitions, as the most intensive anthropogenic interference, alter plant coverage, composition, and productivity directly (Lal, 2002 ; Sartori et al, 2007 ; Jelinski and Kucharik, 2009 ; Li et al, 2016a , b ). Generally, cultivation results in massive losses of C and N from the soil; with plant restoration on cropped land, soil nutrient content can be recovered to some extent (Jelinski and Kucharik, 2009 ; Li et al, 2016a , 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin

et al. 2021

Front. Plant Sci.

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Climate, land-use changes, and nitrogen (N) deposition strongly impact plant primary productivity, particularly in alpine grassland ecosystems. In this study, the differential responses of plant community primary productivity to N and phosphorus (P) nutrient application were investigated in the natural (NG) and “Grain for Green” restored (RG) alpine grasslands by a continuous 3-year experiment in the Qinghai Lake Basin. N addition only significantly promoted plant aboveground biomass (AGB) by 42% and had no significant effect on belowground biomass (BGB) and total biomass (TB) in NG. In comparison with NG, N addition elevated AGB and BGB concurrently in RG by 138% and 24%, respectively, which further significantly increased TB by 41% in RG. Meanwhile, N addition significantly decreased BGB and the AGB ratio (R/S) both in NG and RG. Compared with N addition, P addition did not perform an evident effect on plant biomass parameters. Additionally, AGB was merely negatively influenced by growing season temperatures (GST) under the N addition treatment in NG. AGB was negatively associated with GST but positively related to growing season precipitation (GSP) in RG. By contrast, changes in the R/S ratio in RG were positively correlated with GST and negatively related to GSP. In sum, the results revealed that plant community biomass exhibited convergent (AGB and R/S) and divergent (BGB and TB) responses to N addition between NG and RG. In addition, the outcomes suggested that climate warming would enhance plant biomass allocation to belowground under ongoing N deposition, and indicated the significance of precipitation for plant growth and AGB accumulation in this restored alpine grassland ecosystem.

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Section: Discussionmentioning

confidence: 99%

“…Nevertheless, P addition elevated plant AGB of NG significantly in 2014 (Li et al, 2016b ). The following two factors may cause this effect.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin

et al. 2021

Front. Plant Sci.

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Convergent and divergent responses of topsoil nitrogen and phosphorus content to nutrient addition in natural and restored alpine grasslands around the Qinghai Lake Basin

Luo

et al. 2019

Agriculture, Ecosystems & Environment

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Aboveground net primary productivity was not limited by phosphorus in a temperate typical steppe in Inner Mongolia

Guo

Zhou

Sheng

et al. 2022

Journal of Plant Ecology

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Phosphorus (P) is an essential element for plant growth, however, whether the aboveground net primary productivity (ANPP) of typical steppe was limited by P remains obscure. To detect the effects of P addition on primary productivity and aboveground biomass of different plant functional groups both under ambient and N addition conditions, ANPP and aboveground biomass of grasses and forbs were measured from 2016 to 2020 on a 16-year N and P addition experiment platform in a temperate typical steppe in Inner Mongolia. The soil available N and P concentration were also determined to test the relationship between ANPP and the availability of soil nutrient. We found that P addition under ambient condition had no significant effect on ANPP and the aboveground biomass of grasses and forbs. Whereas, under N addition, P addition significantly increased ANPP and the aboveground biomass of forbs. Furthermore, soil available N and P concentration were increased significantly by N and P addition, respectively. Moreover, there was no significant correlation between ANPP and soil available P concentration, while, ANPP was positively correlated with soil available N concentration. These results suggested that P was not the key factor limiting the primary productivity of the temperate typical steppe in Inner Mongolia. However, under N addition, P addition can promote ANPP and alter the community composition. These findings provide valuable information for the management of the temperate typical steppe.

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Responses of plant community biomass to nitrogen and phosphorus additions in natural and restored grasslands around Qinghai Lake Basin

Cited by 5 publications

References 28 publications

Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin

Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin

Convergent and divergent responses of topsoil nitrogen and phosphorus content to nutrient addition in natural and restored alpine grasslands around the Qinghai Lake Basin

Aboveground net primary productivity was not limited by phosphorus in a temperate typical steppe in Inner Mongolia

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